Examinations were performed on Polish White Improved of 16 kid goats clinically healthy. The aim of the study was to evaluate some selected hematological and biochemical changes in blood serum of kids in the period 60 to 150 days. The goats feed during whole year with the same diets. In addition, HGB 7.81 mmol·l^–1), and MCV (24.46 fl) were significantly higher (P ≤ 0.01) by elders of kids. The findings showed that concentrations of Ca, P, and K were significantly between groups. The level of calcium in period of fattening fell indeed, phosphorus and potassium this however the horizon of electrolytes in blood stayed in borders of physiological norms for healthy goat kids. The linseed cause significant in HDL and total cholesterol in blood serum. The content HDL (1.14 mmol·l^–1) statistically significant (P ≤ 0.05) increase aged with 150 days the kids. Total cholesterol significant (P ≤ 0.05) lower by elders of kids.

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